{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-m1qdxqgg","versions":[{"created_at":"2026-06-10T22:58:10Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19293329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6186dcbb20d15d94f9eb8241b1ed7ad9894cdcaf55a9b149c0f6043989cfaa26","version":9},{"created_at":"2026-06-10T19:50:46Z","element_count":72,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"3acce7e28e62e2ff6c33005507669bb551512c88edb49167f731bd6f7a725d4b","version":2}]}